Face mask with stretchy back strap



FIG. 1 is a perspective view of a face mask with stretchy back strapshown in a used condition with a human figure in broken lines.

FIG. 2 is a front view thereof.

FIG. 3 is a back view thereof.

FIG. 4 is a left side view thereof. The right side view is substantiallyidentical to the left side view.

FIG. 5 is a front view thereof, without the features of the human figureshown in the front.

FIG. 6 is a top view thereof.

FIG. 7 is a bottom view thereof.

FIG. 8 is a left side view of the face mask with stretchy back strap,shown in an unused condition. The right side view is substantiallyidentical to the left side view.

FIG. 9 is a front view thereof.

FIG. 10 is a back view thereof.

FIG. 11 is a front perspective view of a second embodiment of a facemask with stretchy back strap shown in a used condition with a humanfigure in broken lines.

FIG. 12 is a front view thereof.

FIG. 13 is a back view thereof.

FIG. 14 is a left side view thereof. The right side view issubstantially identical to the left side view.

FIG. 15 is a front view thereof, without the features of the humanfigure shown in the front.

FIG. 16 is a top view thereof.

FIG. 17 is a bottom view thereof.

FIG. 18 is a left side view of the face mask with stretchy back strap,shown in an unused condition. The right side view is substantiallyidentical to the left side view.

FIG. 19 is a front view thereof; and,

FIG. 20 is a back view thereof.

The dash-dash broken lines shown in the human figure form environmentalstructure that form no part of the claimed design.

The dot-dot broken lines shown within the face mask depict stitching andform no part of the claimed design.

CLAIM The ornamental design for a face mask with stretchy back strap, as shown and described. 